3v4l.org

run code in 500+ PHP versions simultaneously
<?php $array1=array( array("key1"=>"value1","key2"=>"value2","key3"=>"value3") ); $array2=array("key4"=>"value4","key5"=>"value5","key6"=>"value6"); $array3=array(array_merge($array1[0],$array2)); var_dump($array3);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
array(1) { [0]=> array(6) { ["key1"]=> string(6) "value1" ["key2"]=> string(6) "value2" ["key3"]=> string(6) "value3" ["key4"]=> string(6) "value4" ["key5"]=> string(6) "value5" ["key6"]=> string(6) "value6" } }

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84.62 ms | 2094 KiB | 4 Q